Louise Bates Ames (1908–1996) was a lecturer at the Yale Child Study Center and assistant professor emeritus at Yale University. She was co-founder of the Gesell Institute of Child Development and collaborator or co-author of three dozen books, including The First Five Years of Life, Infant and Child in the Culture of Today, Child Rorschach Responses, and Your One-Year-Old through Your Ten- to Fourteen-Year-Old series.
Carol Chase Haber is a school psychologist in the Hamilton County, Ohio, school system and is a trained and qualified Gesell Examiner. She is the coauthor of several books, including He Hit Me First, Your Seven-Year-Old, Your Eight-Year-Old, and Your Nine-Year-Old.